Re: References to hash elements?

Leopold Toetsch said:
> Dan Sugalski <[email protected]> wrote:
>
>> This is entirely a matter of opinion and data design ...
>
> Yep, that's it. The current behavior additionally is inconsistent.
> Retrieving a reference (that is Parrot) out of a non-existant hash key
> gives and unrelated new PerlUndef, when assigning to that, nothing
> happens.
>
> When you get a ref by an existing key, you can happily change data
> inside the hash.
>
> I've refered to the subject of the former thread, there are examples.
>
> So what will/should Parrot provide, to solve that?
>
> IMHO we are additionally lacking vtable methods to achieve the HLL value
> assign behavior: We only have references inside our aggregates. That
> doesn't matter per se, you can always clone the PMCs before storing, or
> you store only newly created PMCs, that's ok, but in the case of
> retrieving a reference or a value from an hash with an unexisting key,
> it would matter, the one does autovifiy the latter doesn't.

I wonder whether this message from Larry might be useful?

  http://www.mail-archive.com/[email protected]/msg14525.html

-- 
Paul Johnson - [email protected]
http://www.pjcj.net